Diestock



July 7, 1931. G. G. HASSLER DIESTOCK Filed June 4 1928 2 Sheets-Sheet 1 July 7, 1931. ss E 1,813,668

DIESTOCK Filed June 4 1928 2 Sheets-Sheet 2 INVENTOR Patented July 7, 1931 STATES PATEN DIESTOCK Application filed June 4, 1928. Serial No. 282,520.

My improved die-stock may be used for threading or rounding work of various kinds, such as threading bolts, pipe and the like or rounding or reducing to true cylindrical form shafts, crank shafts, as for instance such as have been worn out of round, and the like.

Among the objects which I have in view are the following The provision of a die-stock which may be more conveniently applied to and removed from the work.

The provision of means for more conveniently and more accurately adjusting the cutting dies to the work.

The provision of means for more conveniently installing the cutting dies in and removing them from the die-stock.

The provision of new and improved means for centering the die-stock relative to the work.

Other objects will appear from the follow ing description.

My improved die-stock is of the partible t e com arisin two com lementar arts in YP e hinged relation so that the stock may be opened and closed, and I provide a new and improved character of latch for locking the stock closed. H

The threading or cutting dies are moimted in seats or slideways in the stock-parts opening toward the axis of the stock, so that when the stock is opened, the dies may be removed, and I provide means whereby when the stock is opened up to substantially its full extent, the dies are partially projected from the seats or slideways so as to be readily removable.

I provide new and improved adjustment means for regulating the position of the dies relative to the work and the cut thereof in the work.

In each of the die-parts are formed slideways radially disposed relative to the work and in which are slidably mount-ed centering.

blocks which impinge against the work.

The centering blocks are moved by. the movement of plates rotatably mounted on the stock-parts and are provided with eccentric slots which are engaged by projections on the blocks, the movement ofthe plates serving to advance or retreat the centering blocks relative to the work. When the stock is closed the plates engage so that the center ing blocks may be moved in unison.

Other novel features of construction and also of arrangement of parts will appear from the following description.

In the accompanying drawings, wherein I have illustrated a-practical embodiment of the principles of my invention, Fig. l is a front elevation of my improved die-stock shown closed, the handles being broken off.

Fig. 2 is a rear elevation of the same;

Fig. 3 is an edge view of the same looking down in Fig. 1.

Fig. 4 is the opposite edge view of the same.

Fig. 5 is a front elevation of the die-stock shown opened up. I I 1 Fig. 6 is an enlarged rear elevation of the right hand stock part in Fig. 5 with the slotted centering lever removed;

Fig. 7 is an elevation of one of the centering levers.

F ig. 8 is a broken sectional view taken along the line 88 in Fig. 6 with the lever in place.

Fig. 9 is, a sectional detail taken along the line 99 in Fig. 5.

Referring to the drawings, the stock comprises the two complementary parts 1 and 1a which are of steel and which are integrally provided at one side with the interlacing hinge leaves 2 pivotally connected together by the pintle 3 whose ends may be riveted to hold it permanently in place.

Each of the stock parts is provided with the usual handle 4:. l

Inthe front faces of each of the stock parts is cut-a slideway 5 having its inner end open and disposed toward the axis of the stock when the stock parts are alined.

6 represents the cutting dies, shown as threading dies, whose bodies are so formed as to slidably fit the slideways 5, the dies and the walls of the slideways havinga tongue and groove engagement to hold the dies'in proper alinement in the slideways.

I At a and b are shown markings on the dies and the adjacent wall of the slideway 1a. part 1a. by means of a screw bolt 20 which.

to indicate standard adjustment in the positions of the dies.

The dies may be removed from the slideways or inserted into the same when the stock is open.

The floors of the slideways are provided with spring-ball detents 5a to prevent accidental movements of the dies.

The adjustment of the dies in their slideways is accomplished by means of the screw bolts 7 whose headed ends impinge against the butts of the dies and which are screwed into the blocks 8 which are slidably mounted in sockets 9 at the inner end oi the slideways 5. The rear ends of the blocks 8 are in contact with eccentric pins 10 seated in sockets 11 in the stock-parts and provided with radially disposed handles 12. Thus by rotating the pins 10 the dies may be advancedtoward the work and by adjusting the bolts 7 relative to the blocks 8 the depth of the cut may be nicely regulated.

13 represents levers pivoted intermediate of their ends, as at 1 1, to the two stock-parts, and having their longer ends provided with pins 15 which extend in the slideways 5 behind the dies 6.

The other and shorter ends of the levers 13 are so disposed as to come into contact with each other as the stock-parts are opened, as shown in Fig. 5, thus swinging the levers relative to the corresponding stockparts and thereby causing the dies to protrude from their slideways so as to be readily removed for replacement.

The short ends of the levers 13 are provided with lugs 13a which engage the recessed portions 13?) on the adjacent edges of the stock-parts, thus causing the two levers 13 to have equal and like movement when they abut as the stock-parts are opened to their full extent.

The stock parts 1 and 1a are locked shut by means of a duplex lever 16 which is pivotally connected to the stock-part 1 as at 17 and'whioh has pivotally mounted between its free ends the handle-latch 18 which is arranged to be engaged with the under out block 19 mounted on the other stock-part- The block 19 is attached to the stock engages a slot 21 in the block, thus permitting the adjustment of the block to compensate for wear. i

The range of movement of the handlelatch 18 relative to the lever 16 is limited by the stud 18a of the handle-latch working in the arcuate groove 16a in one part of the lever. The handle is resiliently held in its, position of locking by the spring ball de tent 16?) carried by the lever part which engages a socket 187) in the handle latch.

160 represents a spring catch secured to the stock-part 1 and having its hooked end 5 engaging a recess 16din the adjacent side of the lever 16. The catch permits the lever 16 to be swung away from the stock part sulficiently to allow the parts to open but to enable the lever to be thrown over parallel with the stock part, as when the device is to be packed for storing or shipping, the lever must be drawn sharply over to disengage the catch from the recess.

The rear face of the stock-parts 1 and 1a are provided with pairs of converging slideways 22 in which are slidably mounted the centering blocks 23 which are intended to engage the work and properly center the diestock relative thereto.

The blocks 23 are provided with pins 24 which engage cam slots 25 in the adjustment levers 26 which are provided with arcuate lips 27 on their inner faces which slidably engage arcuate undercut shoulders 28 on the.

stock-parts.

The shoulders 28 are struck on an equal radius described from the axis of the closed stock as a center.

The levers 26 are held in place by means of headed bolts 29 screwed into the stock-parts and engaging slots 30 in the levers concentrio with their lips 27. j

The levers 26 are provided with handles 81 and the inner ends of the levers are squared so as to mate together when the stock is closed and thus to move together about a common center so as to advance or retract the centering bars in unison.

The die-stock is first opened when it is to be applied to or removed from the work, thus greatly facilitating its use. lVhen the stock parts are but partially opened, as when the stock is applied to or removed from the work, the dies are not disturbed in their adjustment, but only when the stock parts are opened to substantially their full extent are the dies projected from their slideways.

means of the cam pins 10 and their handles 12 the dies may be brought into proximity with thework and their nice regulation to produce threads of the desired depth may be conveniently and quickly effected by adj usting the screw bolts 7.

When the stock is opened up, the dies are projected from their slideways so that they may be readily grasped for removal and replacement.

By means of the centering blocks the stock may be quickly and accurately centered relative to the work. The independence of the control of the centering blocks is of particular advantage where the shank of the work in the rear of the portion to be threaded is of less or greater diameter than that of the portion to be threaded.

When the stock is closed, the interengagement of the control levers automatically equalizes the positions of the centering blocks, so that when the levers are moved in unison the consequent movement of the cell tering blocks is the same and thus their positions relative to the common center, thus absolutely insuring an accurate centering of the threading dies relative to the work.

What I desire to claim is 1. In a partible die-stock, the combination of the stock-parts in hinged relation, cutting dies mounted on said stock-parts, lever-mechanism arranged to project the dies from the stock-parts when the latter are opened, and means whereby said lever-mechanism is actuated as the stock-parts approach their fully opened positions.

2. The combination with a partible diestock comprising stock-parts in hinged relation so that the stock may be opened and closed, cutting dies movably mounted in said stock-parts and means for adjusting said dies in relation to the axis of the stock when the stock is closed, of mechanism for projecting the dies from the stock-parts, and means whereby said mechanism is actuated as the stock parts are opened.

3. The combination with a partible diestock comprising stock-parts in hinged relation so that the stock may be opened and closed and cutting dies movably mounted in said stock-parts, of means, comprising levers pivotally mounted intermediate of their ends, for projecting the dies from the stockparts, one end of said levers being arranged to engage the dies and the other ends of said levers being arranged to engage with each other as the stock-parts are opened whereby to swing said levers and project the dies from the stock-parts.

4. The combination with a partible diestock comprising stock-parts in hinged relation so that the stock may be opened and closed, cutting dies movably mounted in said stock-parts and means for adjusting said dies in relation to the axis of the stock when the stock is closed, of means, comprising levers pivotally mounted intermediate of their ends, for projecting the dies from the stock-parts, one end of said levers being arranged to engage the dies and the other ends of said levers being arranged to engage with each other as the stock-parts are opened whereby to swing said levers and project the dies from the stock-parts.

Signed at Pittsburgh, Pa., this 26th day of May, 1928.

G. GARFIELD HASSLER. 

